Abstract: A method of treating a contact lens wherein the lens is contacted with a solution containing a biguanide or water-soluble salt thereof, in combination with a borate buffer system, said biguanide having the formula: ##STR1## wherein n is from 1 to 500, said biguanide being present in an amount from 0.000001 to 0.0003 weight percent.

Abstract: Contact lens cleaning compositions comprising preserved surfactant-containing solutions of a poly(oxypropylene)-poly(oxyethylene) adduct of ethylene diamine having a molecular weight from about 7500 to as high as 27,000 wherein at least 40 weight percent of the adduct is poly(oxyethylene) hydrophilic units. The solutions are effective in removing protein/lipid tear film deposits on both hard and soft contact lenses while providing a prophylactic-like action in retarding the formation of subsequent tear film deposits. The compositions provide effective cleaning and conditioning action using both ambient and high temperature disinfection methods.

Abstract: A preserving solution comprising a microbicidally or fungicidally effective amount of a biguanide or water-soluble salt thereof, in combination with a buffer system, said biguanide having the formula: ##STR1## wherein n is from 1 to 500, said biguanide being present in an amount from 0.000001 to 0.0003 weight percent, useful for preserving, for example, a cosmetic formulation.

Abstract: Protein soiled contact lenses are conveniently cleaned by the concurrent use of an aqueous solution containing an inactivated sulfhydryl protease and an aqueous mild thio reducing agent. The protease is allosterically inactivated by reaction with sodium tetrathionate.

Abstract: This invention relates to a cleansing composition comprising a particulate hydrophilic polymer or copolymer or mixture thereof and methods for cleaning various articles including contact lenses using the composition disclosed herein.

Abstract: Contact lenses are both cleaned and disinfected in aqueous solutions of proteolytic enzyme in a single-step by heating to a temperature of between 60.degree. and 100.degree. C. The cleaning and disinfecting process which may be conducted in one hour or less performs favorably against conventional methods wherein cleaning and disinfecting are conducted separately over a time period of up to twelve hours.

Abstract: A disinfecting and/or preserving solution for contact lenses is disclosed. The solution is an aqueous solution containing 0.00001 to 0.1 weight percent of 1,5-pentanedial, optionally together with up to 0.004 weight percent of thimerosal or other enhancers and optional buffers and the like.

Abstract: A disinfecting and/or preserving solution for contact lenses is disclosed. The disinfecting solution is an aqueous solution containing 0.00001 to 0.1 weight percent of a dimethyldiallylammonium chloride homopolymer having a molecular weight from about 10,000 to about 1,000,000, optionally together with up to 0.5 weight percent of ethylenediaminetetraacetic acid or other enhancers and optional buffers and the like.

Abstract: A disinfecting and/or preserving solution for contact lenses is disclosed. The solution is an aqueous solution containing 0.00001 to 0.1 weight percent of 1,5-pentanedial, optionally together with up to 0.004 weight percent of thimerosal or other enhancers and optional buffers and the like.

Abstract: A disinfecting and/or preserving solution for contact lenses is disclosed. The disinfecting solution is an aqueous solution containing 0.00001 to 0.1 weight percent of a dimethyldiallylammonium chloride homopolymer having a molecular weight from about 10,000 to about 1,000,000, optionally together with up to 0.5 weight percent of ethylenediaminetetraacetic acid or other enhancers and optional buffers and the like.

Abstract: A disinfecting and/or preserving solution for contact lenses is disclosed. The disinfecting solution is an aqueous solution containing 0.0035 to 0.04 weight percent of an amphoteric surfactant in combination with 0.0005 to 0.01 weight percent of chlorhexidine and 0.002 to 0.025 weight percent of a non-ionic surfactant, optionally together with up to 0.5 weight percent of thimerosal or other enhancers and optional buffers and the like. The binding (or uptake) of preservative by a hydrophilic soft contact lens is reduced by this invention.